200cc Vortec heads and a 230/238 cam will need at least a 100shot of juice to reach 536 flywheel hp, sorry. BTW, desktop dyno said that my motor NA should have been in the 600s, it was actually in the low 400s after tuning... NA. Desktop dyno is a tricky bitch to get accurate numbers from, I even input the head flow data across the lift points.
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